Creating an messagebox in forms with look and feel of Windows

Question

I wanted to create an message box in my form with look and feel of windows.For this i used the package ORA.FFI...but i am getting an error....and i am not bale to clear it...the code is as follows
Package Specification: -
PACKAGE messagebox IS
/*Function message_box calls windows MessageBox function. */
FUNCTION message_box(plptext IN VARCHAR2,plpcaption IN VARCHAR2)
RETURN PLS_INTEGER;
END;
Package body : -
PACKAGE BODY messagebox IS
lh_window ORA_FFI.LIBHANDLETYPE;
fh_mb ORA_FFI.FUNCHANDLETYPE;
lh_forms ora_ffi.libHandleType;
/* Function i_mbx acts as the interface to the Messagebox
function in windows
FUNCTION i_mbx(funchandle IN ORA_FFI.FUNCHANDLETYPE,
plptext IN OUT VARCHAR2,
plpcaption IN OUT VARCHAR2)
RETURN PLS_INTEGER;
PRAGMA interface(C,i_mbx,11265);
FUNCTION message_box(plptext IN VARCHAR2,
plpcaption IN VARCHAR2)
RETURN PLS_INTEGER IS
ltext VARCHAR2(500) := plptext;
lcaption VARCHAR2(500) := plpcaption;
BEGIN
RETURN(i_mbx(fh_mb,ltext,lcaption));
END;
BEGIN
lh_window := ORA_FFI.LOAD_LIBRARY('d:\','DclMsgBox.dll');
fh_mb := ORA_FFI.REGISTER_FUNCTION(lh_window,'DclMsgBox',ORA_FFI.C_STD);
ORA_FFI.REGISTER_RETURN(fh_mb,ORA_FFI.C_CHAR_PTR);
ORA_FFI.REGISTER_RETURN(fh_mb,ORA_FFI.C_CHAR_PTR);
--ORA_FFI.REGISTER_RETURN(fh_mb,ORA_FFI.C_INT);
END;
Now when i call this function in When-New-Form-Instance as
declare
p number;
begin
p:=messagebox.message_box('hello','test');
end;
I had created an dll for message box and placed the .dll and .lib files in the d:\ of my system.
I get an error message when i run the app. The error is:
The instruction at "0x005a3b24" referenced memory at "0x00000006".The memory could not be "read".
Can anybody please tell me where have i gone wrong....

Answer 1

Colin Martin wrote:
I agree the leather look is horrible. It's just not a reflection of the cutting edge modern design we have all got to love over the years. If it has to be there at least give us a choice of looks.
There is a word for this (not that one) - skeuomorph. Wikipedia defines this as 'a derivative object that retains ornamental design cues to a structure that was necessary in the original. Skeuomorphs may be deliberately employed to make the new look comfortably old and familiar'.
Common examples are found in audio software with pictures of actual knobs that you turn, as here; and the leather-bound tear-off look of calendar and contacts on the iPad is the same principle: the intention is to make it familiar and friendly to people who might otherwise be frightened off by a modern look because they are not used to modern technology. The whole concept and look of the iOS operating system is being brought into use on Macs for the same reason, to encourage non-tech-savvy people not to be frightened of them.
This is all very well in its way, but in these two particular cases the result is unfortunate, particularly for experienced users, and it really ought to be possible to choose between the looks (as you can with the Mail layouts), even if the skeuomorph is the default.